class Animal:
    def eat(self):
        print("吃")
    def drink(self):
        print("喝")
    def run(self):
        print("跑")
    def sleep(self):
        print("睡")

class Dog(Animal):
    def bark(self):
        print("汪汪叫")

class XiaoTianQuan(Dog):
    def fly(self):
        print("我会飞")

    def bark(self):
        #super().bark()
        Dog.bark(self)
        print("叫的跟其他狗不一样..")

xtq = XiaoTianQuan()
xtq.bark()